Pathetic Service from MTN

Called MTN in December to cancel my contract. i was advised my contract will be closed as of 3 Jan 2020 and a debit of R712. will still go off. the number was cancelled as of 3 January 2020 and R712 went off my STD Acc as advised. To my surprise an amount of R367.00 went off my account In February 2020 Called MTN on the 2020-02-21 ref *** and was advised that a refund is lodged for R367.64 and will be resolved in 7 days. After 7 days called again ref *** and was advised that my MTN ACCOUNT is credited . i must call the the customer care to log a bank refund ref ***, called customer care and they advised (banking ) doesn't not issue refunds , its needs to be logged with refunds department Called Customer Care and logged a call for refunds department to refund my bank account again ref *** was advised that it will take 24-48hrs Still not refund received Called MTN on the 6 March 2020 and been advised that it takes 21 days to refund my bank account. requested to speak to a Team Leader or Manager Spoke to Tumelo Rakosa who advised that i was doubled debited and i wont be debited this month. Tumelo did not even know that my MTN account is closed and a bank refund is required. he didnt know my situation even though he said (his been explained what happened)

He to now advised me that it will take 21 days is required for a refund. and cant assist me further however will get a manager Khaya Lethu Nbaba New Ref : ***.

STILL NO RESPONSE NOR CALL FROM THE MANAGER

Cant understand how refunding a client can be such a mission, quick to debit (which is always on time) yet refunding me MY MONEY is a hassle